Child-like manner of apologizing. Best used when attempting to affect the manner of an innocent or repentant child in a blatant attempt to manipulate the feelings of those who may be mildly upset for a minor offense. Apologies issued in this infant vernacular are best kept simple.

I'm sossy.

This can mean:
1) I'm sorry for forgetting to call you as I promised to do.
2) I'm sorry that you are upset because I called too late after forgetting to call earlier.
3) I'm sorry that you are angry due to PMS of which I am not the cause but due to which I am often in trouble.